Preventing water damage before it starts
Water causes more avoidable home damage than any other single factor. These are the drainage, plumbing and appliance checks that prevent most of it.
Last reviewed 2026-07-15 · About 8 min read
Water problems rarely announce themselves. They appear as a stain, a smell or a slightly warped floorboard months after the actual failure began.
Prevention here is unusually cheap relative to the repair.
Move water away from the building
Grading should slope away from the foundation. Downspouts should discharge well clear of it, not at the base of the wall. Gutters must be clear enough to actually carry a storm.
Watch the house during heavy rain once a year. It tells you more than any inspection.
Check the appliances that hold water
Washing machine hoses, dishwasher supply lines, refrigerator ice-maker lines and water heaters are the most common indoor sources. Braided stainless supply lines and periodic inspection prevent most incidents.
Water heaters fail eventually. Know where the shutoff is and consider a pan and drain where the location makes a failure expensive.
Protect against freezing
Disconnect and drain hoses before freezing weather, insulate exposed piping, and know how to shut off and drain outdoor supply if your home has separate valves.
Know your first response
Shut off water at the source or the main, stop the electrical hazard if water is near circuits, then document with photographs before cleanup for insurance purposes.
When to call a professional
- Water is entering the building envelope and the source is not obvious
- There is standing water near electrical equipment
- You find suspected mould growth over a large area
Source notes
- Insurance